When the men who lived there asked Isaac about his wife, Rebekah, he said, “She is my sister.” He was afraid to say, “She is my wife.” He thought, “They will kill me to get her, because she is so beautiful.”
But David kept thinking to himself, “Someday Saul is going to get me. The best thing I can do is escape to the Philistines. Then Saul will stop hunting for me in Israelite territory, and I will finally be safe.”